Re: Need your help on calculating minimum burst values for CAR

From: Joseph Saad (joseph.samir.saad@gmail.com)
Date: Wed Dec 26 2007 - 15:32:12 ART


Pandi,

My apology. it seems that the CLI forces the minimum to be = max (1500,
rate/2000).

The CLI and the documentation are both misleading as I tried all
combinations below:

TermServ(config-if)#$input 2500000 1000 2000 conform-action tra exce drop

Illegal normal burst size
Increasing normal burst size to 1500

TermServ(config-if)#rate-limit input 8000 1000 2000 con tr ex dr
Illegal normal burst size
Increasing normal burst size to 1500

TermServ(config-if)#rate-l in 20000000 1000 2000 con tr ex dr
Illegal normal burst size
Increasing normal burst size to 10000
Illegal extended burst size
Increasing extended burst size to 10000

TermServ(config-if)#$input 2500000 1000 2000 conform-action tra exce drop

Illegal normal burst size
Increasing normal burst size to 1500

TermServ(config-if)#do sh ver | i IOS
Cisco IOS Software, 3600 Software (C3640-JK9O3S-M), Version 12.4(16),
RELEASE SOFTWARE (fc1)

HTH,
Joseph.

On Dec 26, 2007 9:21 PM, PANDI MOORTHY <moorthypandi@gmail.com> wrote:

> Hi All
>
>
>
> Need your help on calculating minimum burst values for CAR
>
>
>
> My task is to limit the traffic entering the network to 1M with minimum
> burst value using CAR
>
>
>
> As per Cisco documentation, the minimum value is bps divided by 2000
>
>
>
> So for my case BC would be; 1000000 / 2000 = 500 bytes (but in IOS
> starting
> BC value from 1500)
>
>
>
> Is the above formula is correct? Please confirm.
>
>
>
>
>
>
> http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cr/hqos_r/qos_q1h.htm#wp1080850
>
>
>
> Regards
> Pandi
>
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